The Angel of Power 2 Wins
ANDRÁS MÁTHÉ
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Source: Crossref
Published: May 1, 2007
DOI: 10.1017/s0963548306008303
Open original source ↗Source abstract
We solve Conway's Angel Problem by showing that the Angel of power 2 has a winning strategy. An old observation of Conway is that we may suppose without loss of generality that the Angel never jumps to a square where he could have already landed at a previous time. We turn this observation around and prove that we may suppose without loss of generality that the Devil never eats a square where the Angel could have already jumped. Then we give a simple winning strategy for the Angel.
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